Finding the Fourth Proportional to 13,136.78, 19,711.32 and 5,743.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,136.78 : 19,711.32 = 5,743.34 : x
2. Step 2: Convert to fraction form
   13,136.78/19,711.32 = 5,743.34/x
3. Step 3: Cross multiply
   13,136.78x = 19,711.32 × 5,743.34
4. Step 4: Simplify right side
   13,136.78x = 113,208,766.43
5. Step 5: Solve for x
   x = 113,208,766.43/13,136.78
6. Step 6: Final answer
   x = 8,617.69